Emeralds from Riverina, Australia
In early 2019, an Australian client submitted a small series of gem- quality light green emeralds ranging from 2.01 – 5.80 ct in weight, which reportedly originated from the same rough crystal from the Riverina deposit in Western Australia (Figure 1). Known since the late 1970s (Whitfield, 1975), this deposit
Green spodumene sold as emerald imitation
Spodumene crystals (longest item about 50 cm long and 5.9 kg heavy) submitted to SSEF as new 'emeralds' from Pakistan shown here together with a faceted emerald from Pakistan
Genetic identification of ivory species: research and testing
DNA fingerprinting of ivory involves a scientific method that can provide valuable information about the species of ivory being used in jewellery and ornamental objects, in order to determine whether it is CITES- listed elephant ivory or non-listed mammoth ivory. DNA fingerprinting, together with a morphologica
Age dating as a testing procedure for gemstones and biogenic gems
by Dr. M.S. Krzemnicki, first published in Facette 26 ( […]
SSEF introduces machine learning algorithm for data visualization
by Dr. H.A.O. Wang, first published in Facette 21 (June […]
Low-Temperature Heated Rubies From Mozambique
by Dr. Michael S. Krzemnicki, first published in F […]
Sub-surface laser inscription and marking of gemstones
by Dr. L.E. Cartier, first published in Facette 26 (May […]
關於祖母綠產地鑑定的新研究
祖母綠的產地鑑定是一個迷人的課題，為了更深入地了解來自不同產地的寶石特徵，SSEF瑞士珠寶研究院開發了一種新的機器學習輔助的數據可視化方法，並首先應用於祖母綠的特徵分析。
Traceability and Blockchain for Gemstones – an Overview
Recent developments have brought‚ due diligence, along with tracking and traceability, to the forefront of discussions and requirements in the diamond, coloured stone and pearl industries. To address this trend, certification mechanisms and technologies (such as blockchain) are being developed to solve inher
DNA Fingerprinting of Pearls, Corals and Ivory: Research Update
SSEF pioneered DNA fingerprinting of pearls in 2013, in collaboration with scientists from ETH Zürich. This was the first published report of oyster DNA extraction from a pearl, allowing us to trace and fingerprint pearls of unknown origin and match them to the specific oyster species in which they formed.